You can buy single session tickets on Ticketmaster as well.
Here's the link:
https://www1.ticketmaster.com/conference-usa-mens-first-round-session-frisco-texas-03-07-2018/event/0C005431D7A07E64?artistid=2456270&tm_link=tm_homeA_header_search
Use offer Code "NTMen" and the tickets reduce to $15.
Women's session tickets are also $15 under "NTWomen"

Here is the only official tiebreaker scenario I have seen from CUSA. It's listed in the Media Guide online:
Home ﬁeld for the C-USA Championship Game will be awarded to the team that posts the highest regular season winning percentage against conference opposition. The ﬁrst tiebreaker is the winner of a head-to-head match-up. Additional tie-breaker information will be released at a later date.

Rice to host the Championship Game on Saturday.
Looks like some funny math to me, but here's the official release from CUSA.
http://www.conferenceusa.com/sports/m-footbl/spec-rel/120113aac.html
CBS BCS Standings: (Marshall #33, Rice #54)
http://www.cbssports.com/collegefootball/rankings/bcs